Grade 7 Grammar Lesson 3 The future tense
The future perfect tense is formed with will have followed by the past participle.
Subject + will have + past participle
This tense is used to talk about actions that will be completed by a certain future time.
The future perfect continuous tense is formed with will have been followed by present participle.
Subject + will have been + past participle
This tense is used for actions that will be in progress over a period of time that will end in the future.